<template>
  <div>
    <el-button @click="sendEvent">第二个参数发送事件</el-button>
  </div>
</template>

<script>
export default {
    methods: {
        sendEvent() {
            this.$emit('param2-event', "子组件发送了一个事件")
        }
    }
}
</script>

<style>

</style>